Python 240-8XX 091-0593 - Manual (Page 18)

Millermatic Python ® Owner's Manual - Page 6
Section D Maintenance
Periodic Maintenance
Your Millermatic Compatible™ Python ® is designed to provide years of
reliable service. Maintenance of the gun will normally consist of a general
cleaning of the wire guide system, including barrels, drive rolls, and conduits
at regular intervals.
Remove spatter build-up from inside of nozzles with a hardwood stick.
The only parts that are subject to normal wear are the conduit, contact tips,
nozzles, barrel liners, wire guides, drive and idler rolls. A supply of these
parts should be maintained on hand.
The number of units in operation and the importance of minimal down time
will determine to what extent spare parts should be stocked on hand. See
the recommended spare parts list for the most commonly replaced parts.
If repairs do become necessary, qualified shop maintenance personnel can
easily replace any part.
Reference the table below for suggested Maintenance Tools used with the
Millermatic Compatible™ Python ® welding gun.
Testing The Gun
Reference the "X" clocked Amphenol diagram
on the Millermatic Compatible™ Python ® electrical diagram
for information about pin-outs and locations.
Motor Check
Remove the connector from the cabinet.
Using the Amphenol connector, check the resistance across pins
“C” and
“B” (motor leads). The resistance across the motor should be between 5
- 10 ohms as the potentiometer is turned.
If an open circuit or short exist, check the motor leads and motor
independently.
Testing the Gun Potentiometer
Using the amphenol connector, check the resistance across pin
“f”
(wiper) and pin “E”. The resistance should vary from 0 - 5K ohms as the
potentiometer is turned.
Check the resistance across pin
“f” (wiper) and pin “H”. The resistance
should vary from 5K - 0 ohms as the potentiometer is turned.
Testing the Micro Switch
Using the amphenol connector, check for continuity across pins
“D” and “G”
when the trigger is pressed.
Maintenance Tools
Tool Part No.
Drive Roll Removal Tool 931-0100
Disconnect Power
Before Maintaining.